Incandescent gas burner



File@ May s.' 1948 INNTOR ATTORNEY Patented Aug. 14, 1951 UNITED STATES PATENT OFFIICE INCANDESCENT GAS BURNER Erik R. Parsberg, Lidingo, Sweden, assigner to Svenska Aktiebolaget Gasaccumulator, Lidingo, Sweden, a corporation of Sweden K Application May 8, 1948', Serial No. 25,892A v 1 Claim.

The present invention relates to gas burners, more particularly of the type now commonly used in beacon lights, and has for an object to improve the steadiness and power of the light.

In injector burners, substantially in the nature of a Bunsen burner, a mixing chamber is provided with a nozzle for gas supply and openings for the admittance of a certain amount of free air. For the purpose of adjusting this supply of free air to the mixing chamber, a shutter usually is provided. for simultaneously regulating the extent of all of said openings in relation to the gas supply. yIn reality it is impossible always to arrange not only the gas supply channel precisely in the centre axis of the nozzle and the nozzle at the same distances from all the openings but also the openings with the same mutual distances for obtaining a complete mixing in all parts of the mixed stream iiowing to the burner. This causes a deteriorated combustion and luminous DOWEI.

The present invention overcomes the above disadvantage by providing individually adjustable means at each air inlet opening for controlling the air entrance at the various openings.

It is also an object of the present invention to provide a burner embodying an individually displaceable shutter at each air inlet opening.

Another object of the invention is to provide at least four air inlet openings in the walls to a mixing chamber and an adjustable shutter at each opening. i

'Ihe above and other objects, and the novel features of the invention, will become apparent from the following description taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a longitudinal sectional view of an incandescent gas-burner embodying my invention and provided with a pilot burner, as designed for use in a beacon with flash light.

Fig. 2 is a view of the burner shown in Fig. 1.

Fig. 3 is a longitudinal sectional View of a slightly modified form of the burner shown in the Figs. 1 and 2.

Like reference characters have been used throughout the several views to indicate corresponding parts.

In accordance with the preferred embodiment illustrated in Figs. 1 and 2 the main burner comprises a mounting socket I with a gas passage 2 and a connected gas conduit 3 communicating with a gas supply system. From the socket I a gas tube 4 projects upwardly and is provided with a central bore 5 ending with an injector nozzle 6. To the gas tube 4 a mixing ltube 'I is connested and provided with a recess 8 iormins a mixing chamber Surrounding the nozzle 6, a mixe ing passage 9 with ascreen I0 and a flame de? fleetor II. rIhe mixing tube I is provided with a flange I2 on which a conical base ring I3 for a glow mantle 4 rests. A lock ring I5 with two diametrically arranged projections I6 and ac.- tuated by a spring I'I serves for retention of the base ring I3 against the flange I2. The base ring I3, however, is provided on its edge with two diametrically placed notches I8, so that the projections can be set in register with these notches and the base ring with the glow mantle can be exchanged.

The mixing chamber 8 communicates with the outer air by means of four openings I9. Above each opening I9 and on the outside of the mixing tube 'I a shutter 20 is situated and provided with a slot 2I through which a set screw 22 projects so that the shutter 20 is displaceable in the longitudinal direction of the mixing'tube I for adjusting the area of the adjacent opening I9.

The burner described is designed for giving flashing light. For ignition of the fiashes a gas pipe 23 is disposed at the side of the burner and ends with a pilot burner 24 in the neighborhood of the glow mantle I4.

In operation, gas is fed to the nozzle 6 under pressure and while the gas is fiowing out of the nozzle it sucks in free air through the openings I9 but because of any irregularity in for instance the location of the nozzle or the openings or the direction of the channel in the nozzle it is possible that too much air will flow in through some openings and too little through other openings. This causes too much and too little amounts of air in different parts of the mixture flowing to the burner, so that the combustion will be incomplete and the maximum light power of the glow mantle will not be reached. It is hardly possible to ind out the irregularity by means of usual work shop instruments but a simple displacement of the shutters 20 for covering larger or minor areas of the openings soon gives as a result the highest degree of incandescence over the whole mantle. Thus the right adjustment of the shutters or openings will be directly visible'on the mantle. Especially for flashing light it is highly desirable to obtain the greatest amount of light during the extraordinarily short light periods. The apparatus shown is intended. for using propane gas as fuel. This gas calls for not only a large amount of air for the combustion but also narrow limits for air and gas for proper combustion. On that account, the possibility of close control according to the invention is of substantial value.

In accordance with the embodiment illustrated in Fig. 3 a plurality of air inlet openings 25 are located. in the longitudinal direction of the burner. A ring 26 with a tongue 21 at each opening 25 is crimped or soldered to the nozzle piece as shown in the gure. By simple bending of the tongues 21 it is possible to adjust the inlet area of the openings 25.

While certain embodiments of the invention have been illustrated and described in orderv to furnish a clear understanding of the principles involved. it will be obvious to those skilled in the art that the invention may be otherwise embodied and practiced without departing from the principles or exceeding the scope of the invention.

What I claim is:

In a burner for incandescent gas lights, a gas injection nozzle, a conduit for supplying gas to said nozzle, a mixing chamber surrounding said nozzle and in which the nozzle is centrally located, a burner, a mixing tube leading from said chamber to said burner, two pairs of opposed air inlet openings in the wall of said tube communicating with said chamber, the axes of said pairs of openings being disposed substantially at right angles with respect to each other, a plurality of longitudinally extending recesses in the external surface of the wall of said tube and communicating with said openings, a shutter slidably disposed in each recess and means connecting each shutter to the wall of the tube for retaining the shutters within their associated recesses whereby said shutters may be adjusted longitudinally of said tube to vary the area of said openings and thereby control the ow of air into said chamber in four directions to compensate for any misalignment of said nozzle.

ERIK R. PARSBERG.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Number Name Date 948,999 Lungren Feb. 15, 191'0 1,097,086 Fennel May 19, 1914 2,362,342 Baker et al Nov. 7, 1944 FOREIGN PATENTS Number Country Date 160,555 Germany Nov. 10, 1903 

